Triphenylphosphine → 2-(Trimethylsilyl)ethane-1-sulfonyl chloride

Temperature

0 °C

Sulfuryl chloride (43 ml, 539 mmol) was added in 3 min to a clear solution of triphenylphosphine (129 g, 490 mmol) in methylene chloride (200 mL) at 0° C. in a flame-dried three-neck round bottom flask. After stirring at 0° C. for 5 min, the ice-water bath was removed and sodium 2-trimethylsilylethanesulfonate (50 g, 245 mmol) was added in portions over 10 min. The resulting white suspension was stirred at room temperature for 16 h, then it was filtered through a pad of celite. The filtrate was concentrated to ca 50 mL, ethyl acetate/hexanes (1:3, 1000 mL) and celite (40 g) were added. The mixture was stirred at room temperature for 15 min and filtered through a pad of celite. Solvents were removed in vacuo and the residue was loaded onto a pre-wetted column with silica gel (300 mL) using 1:3 ethyl acetate/hexanes as the eluent. Solvents were removed and the title compound was obtained as a light tan liquid (41.9 g, 85%). If not used immediately, the final product should be stored under nitrogen in the freezer or refrigerator to minimize decomposition. 1H-NMR (CDCl3, 500 MHz) δ 3.61-3.57 (m, 2H), 1.32-1.27 (m, 2H), 0.10 (s, 9H).

1. customthe ice-water bath was removed
2. stirringThe resulting white suspension was stirred at room temperature for 16 h
3. filtrationit was filtered through a pad of celite
4. concentrationThe filtrate was concentrated to ca 50 mL, ethyl acetate/hexanes (1:3, 1000 mL) and celite (40 g)
5. additionwere added
6. stirringThe mixture was stirred at room temperature for 15 min
7. filtrationfiltered through a pad of celite
8. customSolvents were removed in vacuo
9. customSolvents were removed

ORD record

ord-cc2aca8e124242fb9f1a89eb4d7c6b32

Source dataset

uspto-grants-2010_08

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07772244B2